From the team that brought you

Herbgrind

Herbgrind is a dynamic, binary, program analsis
to find the root cause of floating point error in large
programs. Herbgrind aims to help programmers weed out dubious
floating point code from their programs, and have more confidence
in their numerical code.

Herbgrind is free software (free as in freedom, but you also
don't need to pay anything), and is publicly available
on github. It's
still a work in progress, and as such will not work on every
machine or application. If you'd like to contribute,
please get in touch or
send a pull request!